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# Lewis Structures

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### Lewis Structures

1. 1. Periodic Table Study Guide How to Draw Lewis Structures
2. 2. Lewis Structures <ul><li>Find your element on the periodic table. </li></ul><ul><li>Determine the number of valence electrons. </li></ul><ul><li>This is how many electrons you will draw. </li></ul>
3. 3. Lewis Structures <ul><li>Find out which group (column) your element is in. </li></ul><ul><li>This will tell you the number of valence electrons your element has. </li></ul><ul><li>You will only draw the valence electrons. </li></ul>www.chem4kids.com
4. 4. Groups - Review <ul><li>Each column is called a “group” </li></ul><ul><li>Each element in a group has the same number of electrons in their outer orbital, also known as “shells”. </li></ul>Except for He, it has 2 electrons <ul><li>The electrons in the outer shell are called “ valence electrons” </li></ul>www.chem4kids.com
5. 5. Lewis Structures <ul><li>Write the element symbol. </li></ul><ul><li>Carbon is in the 4 th group, so it has 4 valence electrons. </li></ul><ul><li>Starting at the right, draw 4 electrons, or dots, counter-clockwise around the element symbol. </li></ul>
6. 6. Lewis Structures <ul><li>Check your work. </li></ul><ul><li>Using your periodic table, check that Carbon is in the 4 th group. </li></ul><ul><li>You should have 4 total electrons, or dots, drawn in for Carbon. </li></ul>
7. 7. Lewis Structures <ul><li>In your lab journal, try these elements on your own: </li></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>P </li></ul></ul><ul><ul><li>Ca </li></ul></ul><ul><ul><li>Ar </li></ul></ul><ul><ul><li>Cl </li></ul></ul><ul><ul><li>Al </li></ul></ul>
8. 8. Lewis Structures <ul><li>On your worksheet, try these elements on your own: </li></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>P </li></ul></ul><ul><ul><li>Ca </li></ul></ul><ul><ul><li>Ar </li></ul></ul><ul><ul><li>Cl </li></ul></ul><ul><ul><li>Al </li></ul></ul>
9. 9. Lewis Structures <ul><li>On your worksheet, try these elements on your own: </li></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>P </li></ul></ul><ul><ul><li>Ca </li></ul></ul><ul><ul><li>Ar </li></ul></ul><ul><ul><li>Cl </li></ul></ul><ul><ul><li>Al </li></ul></ul>
10. 10. Lewis Structures <ul><li>On your worksheet, try these elements on your own: </li></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>P </li></ul></ul><ul><ul><li>Ca </li></ul></ul><ul><ul><li>Ar </li></ul></ul><ul><ul><li>Cl </li></ul></ul><ul><ul><li>Al </li></ul></ul>
11. 11. Lewis Structures <ul><li>On your worksheet, try these elements on your own: </li></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>P </li></ul></ul><ul><ul><li>Ca </li></ul></ul><ul><ul><li>Ar </li></ul></ul><ul><ul><li>Cl </li></ul></ul><ul><ul><li>Al </li></ul></ul>
12. 12. Lewis Structures <ul><li>On your worksheet, try these elements on your own: </li></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>P </li></ul></ul><ul><ul><li>Ca </li></ul></ul><ul><ul><li>Ar </li></ul></ul><ul><ul><li>Cl </li></ul></ul><ul><ul><li>Al </li></ul></ul>
13. 13. Lewis Structures <ul><li>On your worksheet, try these elements on your own: </li></ul><ul><ul><li>H </li></ul></ul><ul><ul><li>P </li></ul></ul><ul><ul><li>Ca </li></ul></ul><ul><ul><li>Ar </li></ul></ul><ul><ul><li>Cl </li></ul></ul><ul><ul><li>Al </li></ul></ul>
14. 14. End of Study Guide. <ul><li>Complete the Lewis Structure Worksheet </li></ul><ul><li>You should know how to draw Lewis Structures for the first 20 elements. </li></ul>